Typewriting and like machine



8 Sheets-fSheet l Aug. l0, 1943. R. G. THOMPSON TYPEWRITING AND LIKEMACHINE Filed July 26, 1940 Aug; 1o, 1943.

R. G. THOMPSON TYPEWRITlNG AND LIKE MACHINE Filed July 26', 1940 8Sheets-Sheet 2 Aug. 10, 1943. R. G. THOMPSON 2,326,312

TYPEWRITING AND LIKE MACHINE Filed July 26, 1940 8 Sheets-Sheet 3album/1f AU8- 10, 1943. R. G. THOMPSON TYPEWRITING AND LIKE MACHINEFiled July 26, 1940 8 Sheets-Sheet 4 Aug. 10, 1943. R. G. THOMPSONTYPEWRITING AND LIKE MACHINE Filed July 26, 1940 8 Sheets-Sheet 5 Aug10, 1943. R. G. THMPSON 2,326,312

TYPEWRTTING AND LIKE MACHINE Filed July 26, 1940 8 Sheets-Sheet 6 Aug-10, 1943' n Y R. G. THoMPsoN 2,326,312

TYPEWRITING AND LIKE MACHINE Filed July 26, 1940 8 Sheets-Sheet 7"Illlllllllllllll t, C No: 11u34 Aug. 10, 1943. R. G. THOMPSONTYPEWRITING AND LIKE MACHINE Filed July 26, 1940 8 Sheets-Sheet 8 E @Qwww i llf. UNITED inner frame each .en Online 3 3 of Fig. 1. n;

VFigi? is a fragmentary, i i? tion of the mechanism shownin Fig'. 7.

Fig. lO is a fragmentary, secticnalvi'ewtaken khonline lS-ii oflifigi..1

VFig 11. is airagrnentaryg sectionalview similar f Patented Ang. 10,1943y TYPEWRfrrING imio'frlnniMaoinni:` iliiisseli G. rhbfiinsn, Elmira N.reassigned@ i j poration of Delaware v This invention relates totypewriting machines,

and more particularly to improvements inthe frame structure of suchmachines. i The kmain object of this inventionY isto'. pro- ,vide animproved frame structureY for typewriting machines wherein -a main frameis provided with readily removable ycoverA members, and thermal' orelements ofthemachine are carried as a `unit 'l by an inner vframe whichYisreadily removable from the main frame.

inner frame within the outer irame'and to ,avoid the necessity ofadjusting the position; roigithe frame,

, L It is also proposed providemeans 'foreperatively-connecting -variousdevices v'oni the inner i frame with associated parts-. on thema'inframe in a manner to permit the innerjframe to here#V time vit Y Vis.placed inthe main f V,It isfurther proposed toprovide; an improvedmeans g for accurately Y locating and holding the Y' f In theillustratedY embodiment 'ofthe'present invention, a mainframestrulctureformsthe out#l erV casing for the sides offthegtypewriting'machine andis Ye'mploye'dyto d irectlysupport certain. o p erating-parts yn.ffthetypewriting machine as will laterappear.v Referring to Figs. 2, 3 and'i,it may beiseen: that .this mainframe comprisesfa rightv .handsidegportionl anda left hand'fsidefporfA 5 t ion I, 'which portions arejoined at ,their,. front `,ends byfaz'lo'w front portion-|1 showninFig;il; '.,.The` rear; portions of-thegsidesfl ,var1'd l6 of the Yfmainframe .are rigidly braced Vbyfanuinterconvn ectinggcross member 2Uwhich isjconnec'ted atjitsi f end mportions to inwardlyi-extendingYlungs, ori-:the

movedv from the main frame without individually manipulating any Yoftheconnecting parts.` Other objects, purposes and characteristic'fea-.tures of this invention will appear as the -cle` scriptionthereofprogresses, during which references Will be made totheaccompanyingdraw@-A ings, in which: L

Fig. l. isal vertical,' side sectional view .of a w typewriting machinearranged. in accordance,

jig. 3 ,is a fragmentary, top sectionalviewtitak- Fig. 4 is afragmentarm-top sectionalview of Vthe rear portion .of the machine showninf Fig. 1.V

with-the present invention, the view showing .cerrtainparts'brokenawayand otherpartsv omitted. Figg 2- isa Afragi'n'entary,frontsectionalz-,View ,takenon 1ine2`2-ofFig. l. f

Fig. 5 is a fragmentary, perspective view of therear` portion of theinnen-frame and vparts carried thereby. 1

Fig. 6 is-a fragmentary, perspectivefview' of y a' portion -ofthe'inside of the mainframe.,

Fig. 7 is an enlarged, horizonta1'sectionalView showing the locatingmeans between the inner frame and the main frame, Y

Y Fig. .8 is a'vertical, sectional 8 8 of Fig. 7.

elevationalview o a 1, butfshowingthe inner frame and vparts carriedthereby moved slightly out ofnormal po? edges oithe side portions .3jf

. 453 viewtaken on line ther .braced Aby an. -ntermediatexlchannel@riem-g y.ber 22secu1'ed by means-not shown to the:lclnyver f Ihesidepor-tions! 5- and '.to. ,provide airigidfmamfirame Structuregfhavinel asmooth and-very. pleasing exteriorfappearance. "1

This'main fr"amje 1structurek is Vadaptedtoibe supe .ported on-afdesktopjor-Iother.supportingsurf"` face'gby'four'eet;23which'maybeofthegusnal 1 resilientv 'c (mstruotion mounted on respectivej-inlA*.Wardlyextending portions 2 4fformed integrally' '1. -'Withthe-sidemembersi andfl. f 40 .in the vend portions ofthe guiderail25 to therebyholdthe'carria'g'ennit against lateral 'shifting in any ,directionrelative'to l the -main frame.; 1n

vI 6 .ofthe main; frame are preferably of @ca'stY metal having as mooth"exterior lsurface withAv variousbossesend .lugsV v `formed il'ltegiallyVonfthe inner surfaces, 'thereofwV for mounting certain, partsoi :themachine "as l l shown or examplein lig.Y 16git mayheseeninFigs.1-andithat'the rearcros's memberf v 2i! is Y 'mounted slightlyforwardoffthe;rear- .f wardends, of the -side members l5 and if L6, t jVand 'this'. croSSfmember 2li together 'with the .iront ,portion-- ifiand channel member 22 are provided which may be generally describedV ascomprising' a l latchmmernber v2l pivotally to aipositionWhereinsanotchat theeimler 1end thereof venters@rijen'm11er greevelinthe extende ing portion of the companion locating screws 26 l ,y u l2,326,312] frcrders'to normalh7 r hold the carriage 'guiderail'gV y 25upon the main frame, releasahlelatch means a frame whichV is removablymounted withinthe main frame. Referring particularly to Figs. 1, 2,

3, 4 and 5, it may be ,seen that this inner frame Y comprisesaright-hand-side plate 48 and a leftf v5 Ahand side plate 49, both ofwhich are generally Y similar vin shape and construction. The two sideplates 48 and 49 are rigidly interconnected by j threecross members58,51 yand 5,2;eamh of which I is. connected at its endr portions byscrews 53 to l0 the'side plates.

as shown for example in Fig.` 1. Thus, in order l Referring to Figs.land 3, it may be seen to Vremove thecarriageV unit, it `is merelynecessary to manually pressfthe two latch members 21 which movesthe'innerY ends-thereof outof the grooves'in `the locatingscrews v2liand (there-f y by permits the carriage guide rail structuref25` 1 togbeliftedlupwardly and'oi the main frame,A `A carriage truck or movableframe is mounted* `for movement-transversely.of the machine .on 'theguide rail structure 25.

' struction as thateinployed vin the'V usual Remington fMcdel No.' 17machine, and may bel briefly Y jdescribedas comprising `an' inclinedrailfm'ember "38 having Yguide-wayssat'itsrfupperand lower edges."Antiefriction rollers Sli (seejligsfllare ledlorturning-movement'in theusual m anner.`- 'l The carriagelis moved inthe'1ezterspacingu- Y`springdrum asshw'nzin Fig.-:4`,whichspring drum isA -mounted'fon theiront side; of thecross "member 28 of the main frame vand is connectedbythe 4usuals'pring drum' tape 'Knot' shown) to the movable 'carriageframe, fI'he letter spacing f m'o'vements of theVcarriagefunder-theforce Vof jthe springdrum 35`-are` controlled by'theusual Y, "escap'em'ent mechanismshown 'in part in 'Figs i72- and vThisescapement mechanism includes anv 'y vesc'apem'entWheelSTWhch'JisrnOunted to" turn 1around a screw 38 secured Atora'fbrfacketi39' (see.` -Fig. 4) mountedfonfthe'crossmember 28 of the"fmaine-frame.;1 'Ay pinion gearl is connected'to l I the escapementwheel 371,' andithis pinion meshes Withaffeedl rack 4l which ismountedon the mov- Y ablecarrialge frame inthe usual mannen', Y .Y

' '1Adogrcik'er mechanism cooperates with-teethvv v 31ofltheescapementwheel 3l, which dogroclter mechanismrincludes arockeribracliel',Y QZ-'asshown v"'in-lidgeld The bracket 42-is mountedVforroclringlmovement abouttrunnions 43 carried'by-the1` Y bracketk39.1A 1 A normally"engaged-holding dog- 44 "is pivotally mounted'on the'rockerbracket` 42, and a spring 45 acts on the bracketfn tonorfv`gfagelnent with -a` vtooth 3l' Vof `vthe" escapernentY fwl'ieeasshownin Fig; Astepping dog Mf'is formed integrally-with the krockerbracket '42 to cooperate withthevescapement -teethyf when[thei'rockerrbracketis moved again'stv'theforce of.A

the springi. r l

' From the foregoing description, 'it Vwillfbenoted that ,the'carriageand parts, such as the springdrumand escapement mechanism-Which are di-Y rectlyA associated therewith for controlling its This movable carriagel V`Trainer structure may be Vgenerally :the same oon-V that the lowerVrear cross member 50 is provided with spaced slots for receiving therearward ends U of printing key levers 54 which are pivotally Vl5.mountedoria wire 55 Acarriedvby the cross mem- 50'..V They key levers 54extend'forwardlyV fromV thecrosslmember 58 through slots in a guidecomb'l secured at 58 to each ofthe side plates 48 and 49. The front endsof the key levers 54 provided withfinger keys 68. 'A l Y The lower front-ross ymember 5l '.is likewise provided with spaced slotsl which receivesub- Alevers 62-pivotallyjfmounted cna wire $3 carried 20 Vextendupwardly in the usual manner and are i Q5 by the cross member 5I.' Theintermediate portion ofea'cn of thesub-ievefsez iscorinect'edby y`-alink '64 rto an'iupstandingportionfonjthe Vcom-v fpanion'key lever54; andfalreturning spring 65 Y'acts onf each of? the fsubieversljSZ finthe usual omannenw A YAftype barsegment SlisY mounted onlthe upper y*crossv Vmember 52V forcase jshiftngmovement in the'f-manne'r'i'iisclosedhin the col-pending applica,-

tion Serial No.'292,461 led August'29,.l939.` The 35 f segments'lcarries typelb'ars mountedin radial j Y slots therein Vt'omove'to andfrom printingposi-Y tion'jabout a'fulcrumewie 63." Each type -bar $3'is' operatedby itslcomp'anion sub-lever-EL regard-V fles'sbf'itscaseshifted position by a connecting 40vlink-10extendingfrom-thelowerrearward part Referringto Figs..- l; 2Vandl,` it may. be seen' Vthat a universal memberfiri "the 'formof vasemi- .'5 -circula`riloar 13 "is-'mounted on the segmentmem- -ber 6T'tobe actuated by. 'the printingY movement of any one of the type Lbars558 intlie'us'ual many "nel:` `VThisr universal bar 73 is provided withrearlward extensionsv Whichare 'pivotallyVv connected so vto .uptsandingportionsof a'rockshaft I4 which V55 portion l1 which carries afpin 'I8adapted-to slide in an opening in the'segmentfmember 6l.

ThefinnerA removable frame vtl'ius carriesfthe l key-leversifandtypeactions of :the present machine' as `Vwellas other associated rmechanismwhich will later be described. E1n accordance rvviththe presentirn'fentio'n, this inner frame is mountedwithin the main -frame forVready re# v movaltherefromrand in a manner which securelyand1accurately positions the type actions and 65 associated'parts in proper"relation to the car- Vv.wri'age and 'other'. parts onthe mainframecooperating therewith. M

that-aninwardly extending shelf portionfy85 is K formed. integrally withtlie-lower'- edge portion "letter'spacing .movements are all mounted onthe *mainframe of the machineand inaccordan'ce witlrthe presentinvention, theprinting instruifmetsiiues such @relief-type ,action andvotherv` parts related thereto: are mounted4 onV an innen i5 of each] oftheV side members I 5 and 'lof the fmain fratrie.`V When the inner`frame vstructure is `'placed'witl'iin themain frame,fthese shelf por-kAi I n Y af typewriting machine; itY 'is 'necessary to' "very'accurately locate the type bar segmentfwith relation to the platenor'the carriagefin Va f orefand-'aftdirection.A If the typebarsegment'is located a slight distance too far inVA front `of theplaten, or a slightrdistancejtoo far in therear ofthe' platen, or'ifthere is a possibility of relative shifting, movement betweenthe vtypeseg- `ment andthe platen, improper printing will objviously result.Accordinglyymeans have .been

provided' in accordance 'with the present invention for Very accuratelylocating the' inner re- Inovable frame-with relation to the main frameandgto'securely hold these-parts in such relative position'in order to`insureV that the typev bar seg-l' ment is always properlyv positioned;with relation to the platen.'

maybe seen that eachof the Abars 90 is 'securely "claniped against theassociated-side plate by screws SI f which pass through elongatedopenings in the sideplate and-arethreaded, into tapped 'openings inthebar. :These openings in the side 'fpla'tes 48 and 49 which receive thescrews 9| Vare V`elongated in a horizontal dir e'ctionk toV permitadjustment of the bars 90 horizontally Vwith re- 'spect' to theside'plates 48 and49 when the screws. Si are loosened.

In order to`facilitate v.accurate adfiustmen't of eachof the Abars 9Bwith relation tothe associated side plate. anefccentr'icadjustingffmeanshas .beenprovide'd the form of ascrew 9 2 .thread- 'ed into latapped'opening'in each of .the. side plates 48 and 49 and havinganeccentric'portion 93 entering a vertically elongated opening infthelocating bar 90. V'Ihu'swhen thel holding screws/9i are loosened, eachof the bars-9 0 may --be very accurately adjusted long itudinally'with'relation tothe associated side plate" by `turning 'the'screw 92Jwhichwill act through the-eccena 523263121? A'structure engaging-thelowervedges oi the Y side plates 4 8` and'49. In' order to prevent later- 'al4 d isplacer'nent vof the innerjframe'with'rela- "tion to" the mainyframe,A a guide strip- 86 A'is selbe' very-securely heldf within-the'main frame ``-bya curved. arm- 98V pivotally frnfounted`A at its]upper 'endfatSS on-anfinwardly extending Vboss on 'eachoffthe side'members' I54 andflof thej f mainframe. The lower endof eaohofV thecurved Y f arms 98 is provided witha vertically elongated 'openingreceivingan ladjusting memberlhaving an eccentric "opening v.therein*receiving thebodyportion of theholding-s'crew--I'Ul whichis "threadedin to an* 'inwardly extending boss on 'the associated 'side memberofthemain fram e.* I' 'An inclinedportion 98..isprovided on the front edgeof'ea'ch vofthev curved; arms 98,' and each 'of thecurvedfarms Sfisadjusted throughthe z ecc'entriememberlll soithat'thisl inclined portion4against"'forward orY rearward shifting movement, means are providedfin-accordance 4with the pres-n 'ent inventionwhichLfcoact with 1 therearward 'ends of the locat'ir'i'g' bar .-l-ltl, whichmeans are 'made-f'adjustablejfwithjr'relationviio thev front.. 1 abutmer'its 9 5 vsofthatV 1 'theV space'. therebetween 'may' be a closelyadjusted"ftd-accord. with the( length oflthe locating'fbarsf. j Thisadjustable' 93 snugly vengages the-curved rearward end'of theassociated'locating bar Sil when the-front vend orf 'this-bar is inengagement with'theheadf of the associated 'screw-v 95.- The? inclinedportions 98' 'onthe-{adjustable a'rins"ljthusoperate on'the; irearwardendsof the'locating bars 90v to;preven t 1 'rearward displacement 'ofthe inner frameasseni-V bly with relation'to'the main frame', yandalsotof preve1it` any upward displacementfof the rear'v portion of theinner'frame.

Releasablellatchin'g'means are p1`-ovided in ac y- I cordanc'e with thepresent invention fornormally Vholdingthe-front en'djof theinnerframeassem-:- lbly against upwardjdisplacement withf1relation'j-'tothemain 'frameReferring to Figs. 1 2 and, y3,'thisreleasable'latc'hing'means comprises -apiv" tedv latch arn''l I0mounted-'0n the outer sidefof Y each ofthe side platesg and-48 'of 'theinnerVY T.Each of theselat'charms I I ispivothally mounted by ashoulderscrewV Il] threaded` 'into' the j associated s idef platei''and thejupperf portionof each'of V the 1atch`armsl l0'is 'provided f witha-notchl I 2 Iwh'ichcoactsgwiththeheadfof an associated screw l `l' 3 threadedinto a'boss extend- `ing inwardly Afrom eachofsthefside-portions"l5 tricportion 4553l to move the'bar either forward- Vly' or rearwardly tothedesired position. The` holding screws '9| maythen be tightened to'securely lock 'thelocating bars 9 0 in their adjusted position.

rlhe front, and rear endsjfof the locating bars '98 coact with means onAthe main frame for preventimg displacement of -*the inner frame.eitherforwardly orrearWardly from normal position. Thus, as maybes'een-in Figs. 1 2'and '7, a headed screw 95 is threaded irito aninward- *ly extending .boss portion on'each-of theside i members I5 andI B of the `main frame. @When the inner frame assembly is placedwithinthe "and I6 0I" the main 'frame'."""` VThe lowergedgeportionfof'thenotch |12 in eachV ofthe latch armsj'l is inclined as shown particularlyin Fig'. 1- so thatawedgingor (camming Aac'zti'on is effected thereby.'on the' headoff-the associatedscrew U3 ras'tliedatchl armyl'HJ is iVYdrawn rearwadly underthefforce of an associated contraetile--spring""'lfiffEacW of fthe Vbetween'th'eupper end of' `llfand a pin H6 on-.theasso-*r j 'ciated side plate; When the inner frame assernbly-1simposition within' 'the main f rame,the arms I'Hlare thus operated bythe springs ||5 to a, position wherein the camming surfaces at thev`lower portion ofthe notches ll l2v coact with the heads of the screws H3to securely hold the front Y 'portion'oi the'sidejplates'48 and 49 inengageinherit with` the shelf portions 85"of1 the main' 'frarneiz "Whenfthe inner' frame is placed within the 1 f mainframe the weightv issupported Iby thel shelf' portions 85er thejmain 'irarnefwhilellateraldisplacement Ais prevented'bythe guide strips'786 Ventediby thecooperation of-theabutments- 85 kdem.enr-1e, bars se,whilenpw'arddierleeementge the front emi fefftheinrller frame ,isprevented :by :theaction ofthe springepressedlathgarnisI'lil :the screwsHq; ach ofthevarms Siinaybe onels ffeaon of-thelocat'ing bars withthecoL' Opera abutmentsyre and-S-Tne inne-r' reame Ymay elselbeadie'ted-iwith: relation to; the

locating bars Si) by .releasingthe holding screws :ai and turnimatheeccentric! adjustments 82 until the exact 1 lforward and; rearward.position and is'cbtai-ned *with relation'totheplaten 33 and othercooperating parts' carried' by the. main frame.; rIhe holdingscrews 9|-and I!!! may then be s'ecurely'- tightenedsoi that inner frame rigidlyretained `in its proper position.. l,

The entire inner. frmeassembl'ymay be easily .andquickly .removedY-ffrern the mein frame ley amerely operatingbothofj the Ylatch arms 5|f o1 v -wardlyandthen raisingfthe'front portionjof the inner frameupwardso that therQntf ends of the' ,la'tingbars Si) are abovethe headsfof thescrews ,SQ .thereby insuring thatthe rearward Y'portion -j-positionbehind the heads-of 'the screws S5', the

- latch arms `l lecoeperatefwith thescrews ||3 of fthe, mainfrarneund'ertheforceof tthe springs l I 5 to insurefthat 'theironrtiorifof the inner frame issecurelyrheld pro position-upon the shelf:portionskBQf-:

` he escapement y .ed on kthe mainj'frame isoperated by theunivervsalbarflv which is mountedonV the inner removf :able- `frame, andVaccording.ly means are provided in: accordance with thefpresentinventonforop- Ydog' rocker i2 without inany-manner.interfering with theremov'aland replacement-of :the ini ner vframe assembly ,with -relation to the,main j frame Referring-to Figs;V 1,`- 2; 4 and 5;'fthe rear- `wardextensionat-the' left-hand side of theuni- -versal bar 73 isl providedywithua contact portion |29 whichrcoope'rateswitha pin' |2|' at the endj vofa'n upstandingrarmlZZ V(see Fig. l) onta rocker -bracket |23 Thisrocker bracket is pivotallyA Ymounted at |25 on a U-shaped bracket |25which i depends from lthe horizontal portion at the top Yoithe'rearcross member 29 of the main frame.

f i-roeeretioeief:the-dee .rockeegez' ':Theee -Serereble n connectingparts liliand-I 2 ohtiouslyfpermittlie Y innerfreme @be reelimemeveditem ehfe'meln vf-reme. feneieedily freeleeediherein, without ina.-

vnipulation o f any oijtheparts 'connectingthennii f-verseliberiwiih-iheseeeerementgdee reek'er 1 'alhe preleentmeehine eleeinelildesl .e.ker-o1.y

15o individually; adiueed 'Lili il-'1e mennerreeveusly 'eoiniedgcut to@freebie ,Snueengeeemeet vQi the vthe 'correctrelative alignment of. theinner Vframe e in the .usualmannerto'lg- ,Y ar'rn' o n theirockerbracket '136.

erate'd b acksp'acingmechanism cooperating'wth iheieefepefientlnheell ie.eeeee e 'beek-Sewing movement ofthe carriage, Referringfto, Figs. 1.

.nioiuitedzon the c'ross, member 50 of the inner ram'e, a.

which cooperates wit [bracket vis pivotallymol'nted'at |31 on' abracket|38 secured tothe rear-1,cross.llierlflbrrv 2,0 of the mainframe 'asshown. lnFig, The lower end of a back-v spacing' pawlfM. is pivotallyconnected arwardly extending An operation of the back-'space keyilever'|32 operates vthrough the. abutting connections .|34 'fand|35'to causean'upivard'moverr'lent oi the back spacing -pawl 14a. which cooperateswith 'the escapement' wheel 31 to 'cause a .backe'spaci'ng movement of.the carriage in thefusualfmannen fmovefl from the machine by anjupwardand forp'a'rabl'e connecting parts L34 :and '|35 readilyremovedandreplaced -with relationt'o' the frame .without manipulating-'the 'operatiue The space bar 'nehanisrnein the'p'r'e'sent'majchin'e isentirelymounted in the main frame and rauhe front andermaalleverslisrwmcn are -o the inner frameis,inpropervposition upon' the.shelf portions nffthe mainfframe. Thus, when thejorward endsof locating.barsgSU moveinto` vfare pivotallymounted on a cross'bar |'.51' exteni d-L fingbetween theside'vplates 48 and48- of the-inner erativelyconnecting the universal bar;` |3' w it h` the mi is mountedonpivotgserews 14a (see, Eig. 2') extending endwardly from the two sideportions l5 a'nd'l vo'ffthemain frame' and an' arm |43 f extendsrearwardlyirom the rock shaft |'41for A tabulator'mecha'nism isal's'oiprovided'in th Y "present "machine which includes a tabulato'x"bar |55mounted atthe end of 4parallel Iarms |56which 'vfra'n'e' as'shownin Figs. 1 a'nd'3. 'A depending "Perdon offone @finer-apuntar arms" essAis piviota'lly connected by"`a link |52 to the depending mountedin'f'agude-slot'in the cross member 52 .The rearward extendingend ofthe.bell-crank |58 A 'depending arm |27 (see FigfZ) on the [rocker i,bracket `23"v ,is pivotally connected by a link 28 'togthefdog rocker42 whereby the rearward oper- .a'ingmovement of thelmversal bar-1 3operates Y f 'rnolinted on the carriage.v

.is providedwith an adjustablecontactrscrew |53 l 'as shown in Eig. 5,which contact'screwjis normally in a position to coact with the lowerendora tabulator stopin'the form, of a vertically dsl ftion of the-U-shapedbracket |25. "The upper .Y end or the stop member: ISB-is'operatedupwardly by depression of the tabulatoribar |55 into a posi-y :tioncooperatingwith tabulat'or stops (not-shown) The tabulatormechanismals'o includes a tabulatorstopsetkey 65 '(s'ee Efig. 3 ).whichis mount..

atacar-1.2

ed; at'iV-the front; end: of? ankarmV |65 .otaqrocker bracket |67.which. is mounted 'to turnaboutthecrossjbar |51.. A depending Yarm on`the rockery/r bracket 67"! connected vbyja link 68 to the def; pendingarmvof abell crank |69.whic'h is similar to the ben cram; |53 and`mmmtedinl a slot in stop blfnor shqwa,wnchiisimoated-fentre detacablecarriage railg 251A for. oper-ating the-map gin stops toareleased'pcsitionin the *usual,majo-v f' #ner-5111 margin 'Siep-.ff leasearrangement the cross member 52 ofthe inner frame to turn Y.

about the pivot rod. |59.V The rearwardly'exf;

n tendingportion` of the bell crank |69 is provided Y fwith anadjustable contact screw |10. (see Fig. 5)` which normally. cooperateswith the lower endgof bhefkesr lever-mechanism elevated Gn the@ eerYra'meinc'ludes; acontactportionwif whichgis readily separable fromthe-'cooperating part 89 mounted on the main frame .top-ermit'the innerframe to be readily removed iromtlie vmain frame without manipulatingYthese?V interconnecting ber is guided bythe slotted bar IBI and aslotgin thebracket |25 on they'main frameyin asimilar manner'to theVstop member IEE. The upper end of the slide member cooperatesfwith;mechanism (not shown) on the carriage to prjectjthe carriage tabulatorstops into eective the usual manner. i g Y The Ytabulator [mechanism1`further. includes means for clearing or restoringtl'ie carriagestops vto ineffectiveposition which comprises a stop; clear key |13 at thefront end ofan'arm1 |'|4,of=a l position ;inV

rocker bracket, lwhich ismounted to turn about.

the cross bar I5?. -A depending portononthe rocker bracket |'l5 isconnected by alinkl'lto A member 52 ofthe inner frame to turn about`:the pivot rod |59. .t The bell crankll is likewise provided Vwithan'adj'ustable-contact screw |'l8fwhich cooperates withthe lower end ofa slideimember |19 which is likewise mounted onrthe main frameA f by theslotted guideloarv |6| .anda vslot in the bracket |25. The upper end ofthe slideY member |79 isshaped to coact withthe carriage tabulator stopswhen operated upwardly by-a depressionv of theclearvkey |73 in a mannerto .canse these carriagestops to be cammed backtoineiective Thetabulator mechanismV of the. 'presentgma-V chine thus includes key levermechanismmounted .on the inner removable frame as wellas'partsroperatedthereby whicliY arev mountedlon theymainj frame, and the operativeconnectionsprovided by abutting relationgof Ythe Contact. screws |63,4|10 and |78 with the lower ends of the slideV members l |68, Vand |79respectively provide separable connections permitting theinner frame'tc:be readily removed from the mainframe without individual manipulationoi-anysof these operative connections. y .f The present machine alsoincludes mechanism for releasing Ythe carriage margin stops 'comprisinga margin release key |85 at. the front end of a keylever |86 which ismounted izo-.turn "Y about the pivot wire 55 carriedby the cross memeber50 of the inner frame. VYAn arm |81 .(seeFigs. 1A and 5) extendsrearwardlyand upwardlyffrom Vthe depending portionof a` bell crarnkVlrwhich isfsimilar to the bellcranks |58' and |69' and is.likewise-mounted in a slot inthe cross bail `i 98nd lits* positionshown in Fig. 1.

Linehlocking rne'clranism` is "3 also previded 'in' Ythe presentmachinewhich'ifunctions toprevent eiective operation of the printing key.levers :and the space bai' njrlnen the .carriage reaches v a `pre-vdetermined Vleft* hand positien. 'Lv Referringrtc Figs'. f l, 2 and-4,'a universal line lQQkbailJBSismOUnt:

ed for rocking movement onpivotscrewsflil carV frame. 'upstandin'gfar01rd @he universal As ShWn'in'Fie. @tithelow-e"M pass v.beneath hookedportions onupstandingarms 209 VOn-thespace lcarflevers |46.: and`4thereby pref Vg lvent?, an.v effective operation 'o'fjthe" space bar as4:0` position by the movement` of theV carriage. ,te s

' Well Aas theprinting Ilreyflevers.`

` "The-portion of! theline flock 4fremovarie'mime,and'this l anismcooperateswitlipartsnounted'infthemain" Vframefwhiclj. arecontroll'ed,inthe usual .manner toy l The rearward .end ofthe'crankfarm"292. isprior-gf vided lwtnf aiyupturned contact prnoniz l 2 4- vVadaptedtofcooperateLwitlitheeridfofan adjust-v p however, isy normallyeffective ing ma 2m eihomfthegjrbottnr eine 10d;A .han |93 'inf itsillustratedforward.position wherein mannered portion'|9871,ages.notieoact'witnme Y portions and V2|lil'of Ithe key leversandjthus permitsffre operation thereof;

iai' *described fis` entirely portionofjthemech'- by the linelck 'stopmechanism ,onthegcarriagei K. ablefcon'tac't screw EIS-carriedbythelwerend the key lever |35 andthe end thereof is provided witha'contact portion |88gwhich coactsiwitha"V pin |89 at the lower end ofabell crank 80 car:-

ried by a bracket |9| secured tothe crossmern-V ber 28 of the mainframe. as shown in Fig.2..f..:

n The rearwardly extending end `of the bell crank 90 coacts with theVarm of-.a transversebellcrank |92 (see Fig. e): which is pivotall'y,mountedat V|93 on; a boss Vprojecting1rearwardly#fromithe' 'rear crossmemberZ of4 themainzframe.'V The uppergarmlof the bell crank |92cooperates'with a toeportion of a slide member |93u (s'eewFig. '-1)mounted on the detachable,guiderailj25of vthe carriage.structurerV Theupper. end othe'fslide L member |33 is connected to -.the .usual VmarginA end of thesswinging. armAZl is Yco ma bracket 2:16 'SeCuedftO-iheerosi0 Aof the main .f-rame, The -left hand .nrleted'tthe dependingqarm .of abell crank 2 l 8 Vwhich is Valso jpivotallyrnount Ontl'le-bracket 2|6-andis pro- 1 .vided"with.aneupstandinearm (not shawlv" @of actingwith lmechaviemf f; the-1usuaz-90estmcs tioniemriloyed 'in-thefReenetbnModel Nall, mahmewhichis' mounted naheffcariag-uit f aridfis ppeliateabr@eline-Meltemi@ .toeffebtppf y -..aeration of the portion pffnezime.lockgmechae From the` above descriptionl of @isernia 295) .theconnecte" s theisides of the main frame.`

nach or the side flanges @ferirecyerllziais provided with a 'hook-shapedvportion 521i' which ward displacement; and means-areprovidedat theVu'pper-portioii of theV covermember 21e' for retaining thehook-shapedportions 21| in posi-f tion'on the pinsl '212 and to normallyhold-the upper portion againstV rearward and 'downward e Y n 2,326,812 ithe verticalside 'Y flange VVVportions` V'are adapted to" vlit'closely-inside the A,rearwardv end portions ofy justinent thereof. Thisinner frame unit. isfthenl 'sultyit `has' been jn'ecessarylto 'providerseparable' displacement. This" meansVv comprises `a'hmikshapedr detentmember .214;VV pivotally connected at -215 to 'each of the 's'ideange'sof the cover'z'l and having a curved portion-'adapted to partiallyembrace the upperportion of a pin Zexten'ding inwardly vfrom the rearupperlportion-of eachof the side'portions l5 andf'l'of the main frame.

-JA 'contractile' springv'2-11 'extendsnbetweenffa e forward armfon eachof thedetent'members2li anda lug formed onthjs'- associated zsideflange' of the c'over member 219.- These L*springs V21? l'act Y on thedetent'membersf214in a' manner to `se\ Vcurely hold the lcover memberA2153A :in 'aposition wherein the`-iront edges of the :side`latnges-'there V .of engage the'vpins' 21B, andltheinclinedfinner Yedge portionsof the hook-shaped ends'of ther de-` tent members 214 exerta camming or wedgingA actionfonfthe pins1216fto-normally hold the covermember in an upward land inward `position against Vaccidentaldisplacement.

Whenrit is Ydesired. to remove the' rear cover tions 21| are rst hookedaround .the screws 212 Vand then the top portion is forced forwardly sothat the inclined front portions-of the `detent members 214 are cammedupwardly by engage# 'I'he cover member 210 is thus eiective tocompletely enclose the rear portion of the main frame aswell as the rearportion of the carriage assem-v bly, and'yet is readily removable topermit access toany ,ofy the parts at the rear of the machine. It willfurther bepnoted that the rigid hook- -shaped portions 21! at thebottomof theA rear cover member pass beneath'the pins V2112 on thev mainframe, and accordingly the cover member 210 will not be inadvertentlydisplaced or re-vV moved if the machine is raised bylifting upf wardlyon the' lower edge of the cover member.

When it is desired to replace the cover member 21S, thevpor- Y Alfurtherimportant feature ofzithe present-fin Y Vention residesffin thearrangement Afor'adjusting,v

theeinner removable framewith relation to the` y mainframe to affordproperr operation of the mai chine. Whenv the proper adjusted relationbe`` -f tween the inn'er frame andthefmainframefis onceobtained,thiskadjustment is not disturbed by the removalvr ofthe innerframe assembly and g thesame proper lrelatioiris assured when' theinmember, the upper portion thereof may be forced I "Y f ment with thepins 216 so thatthe noses of theV members 214 pass'over thesepins-whereupon thesprings 211 become effectiveto securelyhold the covermember in normal position.'

connections between various mechanisms .which arejointlycarriedtby theinner `frame and vthe mainframe.v4 i .i y ;V Aaf, :In the present.machine, fthese. separable .'con-v f Anections-have been included in'the escapement mechanism,'1-th :back.rspacinglmechanisms the",l -vtabulator. mechanism, the \margin'Istopreleasing` y mechanism, the linelock'mechanism-and the o ribbon feeding mechanism. `Eacholf'th'ese"-dilierv fent mechanisms' is carried i'nlpartiby the/'innere, f rrame'and 'in partgbythe main '.framefand thek 'interconnectingpartshave beenfsoarrangedthat e thesinner frame `may be 'readilyfremovedwithout individually manipulatingsanyf of r`these conn'ec-` tionsiandfwhen-.the innerframe is=v replacedall Y .are-brought intoaf-:col

of'..these connecting parts V'operative relation. f:

ner Aframe is replaced. Y l I The invention,claimed-is:V j i' l. Inatypewriting machine,` .theV combinationv Y of a'mainframeincludingiront andsidej portions, an innery frame, releasablelatching means f f for securing said inner frame-within'said rnainv fframe, a rear `cover member for closing the rear portion orl saidfmainframe, means Ycoacting be-V tween said rear cover :member and `saidrn'ainl j frame for releasably `latching said rear coverH member on saidmain frame, Ya top cover memv f 'Y ber for closing a portion of the topof said main cfa `main frame including'front and side por.-V

tions, ak rearV 'cover` member for closing the rear portion of said mainframe, means for releasa-v .ably latching saidv rear covermember'on'said Y main frame, a toprcover member for closingA ay portionof, the top'of said main frame, and'- An .improved frame structure foraLtypewrit'- f Y ing machine has thus been provided wherein theY mainframe has top andfrearcover members for protecting the internal ,partsVof thefmachine e of themachine A i.

This main frame of the present machine has against dust and dirt and toreducethe noise of .Y

operation of the machine. A particular `feature frame," and `meansVcoacting. between said. top.y cover memberand said inner frame 'forreleas-V -ably latching vsaid top cover member on, said e main frame.

2f. In a typewriting machine, the combination means fcrreleasablylatching` said Y. top cover" member onjsaid'main framef 3. In a`typewriting machine, thecombination of ak main frame, aninner-frame'removably f mounted v therein, locating bars adjustablyA y*v mounted oni said ,inner fframe, 'iixedabutments l' on said mainframe,cooperating with vone :end

' of said vlocating bars, adjustable pabutments on the main framecooperating with the yotherpendf` of said locating barsyand releasablelatch means coacting betweenxsaidmain Aframe andsaidinvonly a few partsmounted at the'rear portion and 75 ner frame to normally preventmovementof thel side vportions'thereof lwhiclimay be easily andfAquickly assembled thereon. :The majorfelements' 1 j arefthenbarriedasa-unit byganinner-framev which' permits very convenient yassemblyandad; i

4.. In aftypewrioogmehme, thelemoafin- '-of, a moinfmmezarrnneryframeremovabiy Y mounted thertenyguide `Ways in Said main,Vrzuaaejf for, supporting said. inner vixfaane; vagainst', datemi:

movement, adjustable means: cooperating; with', ASaid.` inner frameaforf,.preventng enwise monroement ,of -said Yinner .frame relaton -tozsaid:

meansfto prevent` edwis'e movement foi Vsijd: in-

' inner 11ndzouterfframes; ja" locating; kmr;v ex:- Vtending in a fore-ond-aft direction yoil-one ofV tween vsvgidernain imm@ andlsaioirinen-frjame-ion reasably holding'"saidA locating mea-ns inlofopertvereltioh with sadi oleansfon'the rhein.

main frame, means on'sadv'mainirame comixing with thefmyil'a.1.d.oxide-oi eaidf'looating heirs to .prevent farvi/'afro#maniement Toi saidl rmer# VHome with i-relagtion-tosindl main{mmm/.any1 re;

Mable 'holding Ymewns fior; preventing npwagtdi inner frame withre11a,;i=m to' the outer firme; and` moana; coaching. between.sai'dtinner and;

tionsg, a "rear oo ver, meargs- 'rigidi-y; holding the lower portionreif. .sidxrer @over osein :hore

zontal endg-upward'. movement,A ,but .eiordmgf 1 downward movement1relativeio the; main, fra-me;

1 and detenta meapsreleosobly holding; ,the opper f portioV of 'saidvrear( cover againstreafrrwarqiand @QW-nward fmwment A to permit;vaxfexneval Y of the' rear-v Cover; 'only by-1*VV rearward: enel?ldownward j

